ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (S1): 255-267. doi: 10.7668/hbnxb.20190408

Special Issue: Tobacco Drought and water saving

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Water-potassium Coupling on Growth, Yield and Quality of Flue-cured Tobacco

TANG Hong1, WANG Jianwei1, ZENG Zhangquan2, LI Xiangyang1, YAN Hongguang1, DENG Jie1, LIU Lunpei1   

  1. 1. School of Life and Health Science, Kaili University, Kaili 556011, China;
    2. Hengshan Research Station of Forest Ecosystem, Hunan Academy of Forestry, Changsha 410004, China
  • Received:2019-06-03 Published:2019-12-28

Abstract: The aims of this study were to reveal the appropriate mode for water-potassium coupling of flue-cured tobacco in Qiandongnan Prefecture, Guizhou province. Three irrigation rates: 0.50 L/plant(W1), 1.00 L/plant(W1) and 2.00 L/plant(W3), and three potassium fertilizer rates:135 kg/ha(K1), 270 kg/ha(K2) and 405 kg/ha(K3) were set in this field plot experiment, resulting in a total of nine treatments. The effects of different potassium application rate and water irrigation rate coupling treatments on the growth of flue-cured tobacco, yield and quality of tobacco leaf were studied. Different water and fertilizer amounts significantly or extremely significant influenced the plant height, maximum leaf area, stem girth and root volume, and interaction effect existed between water and fertilizer amounts. Water and fertilizer amounts significantly influenced total sugar, reduced sugar, alkaloid, total nitrogen, potassium and chloride contents in tobacco leaves(C3F grade), the smoking quality and appearance quality of flue-cured tobacco leaf increased with the increase of irrigation rate and K rate, and interaction effect existed between them.Water and fertilizer rate significantly influenced tobacco yield, and interaction effect existed between them. Considering all above, when irrigation water quantity was 1.00-2.00 L/plant, K application rate was 270 kg/ha (W2K2 and W3K2), the growth of tobacco plant, yield and quality of tobacco leaves were improved. Linear fitting revealed a positive relationship between plant height, root volume and yield of tobacco leaves within a certain range. When irrigation rate was 1.00-2.00 L per plant, K application rate was 270 kg/ha, water-potassium coupling treatment had a good effect in promoting tobacco plant growth, increasing yield and improving quality of tobacco leaves in tobacco-planting in Qiandongnan Prefecture, Guizhou province. From the view of obtaining high yield and saving water and fertilizer, W2K2(1.00 L/plant, 270 kg/ha)and W3K2(2.00 L/plant, 270 kg/ha)treatment can be used as an appropriate combination under the present experimental conditions.

Key words: Water-potassium coupling, Flue-cured tobacco, Growth, Yield, Quality

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Cite this article

TANG Hong, WANG Jianwei, ZENG Zhangquan, LI Xiangyang, YAN Hongguang, DENG Jie, LIU Lunpei. Effects of Water-potassium Coupling on Growth, Yield and Quality of Flue-cured Tobacco[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 255-267. doi: 10.7668/hbnxb.20190408.

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